Pore-scale investigation on stress-dependent characteristics of granular packs and the impact of pore deformation on fluid distribution
Abstract
Abstract Understanding the effect of changing stress conditions on multiphase flow in porous media is of fundamental importance for many subsurface activities including enhanced oil recovery, water drawdown from aquifers, soil confinement, and geologic carbon storage. Geomechanical properties of complex porous systems are dynamically linked to flow conditions, but their feedback relationship is often oversimplified due to the difficulty of representing pore‐scale stress deformation and multiphase flow characteristics in high fidelity. In this work, we performed pore‐scale experiments of single‐ and multiphase flow through bead packs at different confining pressure conditions to elucidate compaction‐dependent characteristics of granular packs and their impact on fluid flow. A series of drainage and imbibition cycles were conducted on a water‐wet, soda‐lime glass bead pack under varying confining stress conditions. Simultaneously, X‐ray micro‐ CT was used to visualize and quantify the degree of deformation and fluid distribution corresponding with each stress condition and injection cycle. Micro‐ CT images were segmented using a gradient‐based method to identify fluids (e.g., oil and water), and solid phase redistribution throughout the different experimental stages. Changes in porosity, tortuosity, and specific surface area were quantified as a function of applied confining pressure. Results demonstrate varying degrees of sensitivity of thesemore »
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Pennsylvania State Univ., University Park, PA (United States)
- National Energy Technology Lab., Morgantown, WV (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1237361
- Alternate Identifier(s):
- OSTI ID: 1401615
- Report Number(s):
- SAND-2015-0082J
Journal ID: ISSN 1468-8115; 558361
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geofluids
- Additional Journal Information:
- Journal Volume: 16; Journal Issue: 1; Journal ID: ISSN 1468-8115
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; computed microtomography; experiment; pore structure; saturation; stress
Citation Formats
Yoon, Hongkyu, Klise, Katherine A., Torrealba, Victor A., Karpyn, Zuleima T., and Crandall, D. Pore-scale investigation on stress-dependent characteristics of granular packs and the impact of pore deformation on fluid distribution. United States: N. p., 2015.
Web. doi:10.1111/gfl.12143.
Yoon, Hongkyu, Klise, Katherine A., Torrealba, Victor A., Karpyn, Zuleima T., & Crandall, D. Pore-scale investigation on stress-dependent characteristics of granular packs and the impact of pore deformation on fluid distribution. United States. https://doi.org/10.1111/gfl.12143
Yoon, Hongkyu, Klise, Katherine A., Torrealba, Victor A., Karpyn, Zuleima T., and Crandall, D. Mon .
"Pore-scale investigation on stress-dependent characteristics of granular packs and the impact of pore deformation on fluid distribution". United States. https://doi.org/10.1111/gfl.12143. https://www.osti.gov/servlets/purl/1237361.
@article{osti_1237361,
title = {Pore-scale investigation on stress-dependent characteristics of granular packs and the impact of pore deformation on fluid distribution},
author = {Yoon, Hongkyu and Klise, Katherine A. and Torrealba, Victor A. and Karpyn, Zuleima T. and Crandall, D.},
abstractNote = {Abstract Understanding the effect of changing stress conditions on multiphase flow in porous media is of fundamental importance for many subsurface activities including enhanced oil recovery, water drawdown from aquifers, soil confinement, and geologic carbon storage. Geomechanical properties of complex porous systems are dynamically linked to flow conditions, but their feedback relationship is often oversimplified due to the difficulty of representing pore‐scale stress deformation and multiphase flow characteristics in high fidelity. In this work, we performed pore‐scale experiments of single‐ and multiphase flow through bead packs at different confining pressure conditions to elucidate compaction‐dependent characteristics of granular packs and their impact on fluid flow. A series of drainage and imbibition cycles were conducted on a water‐wet, soda‐lime glass bead pack under varying confining stress conditions. Simultaneously, X‐ray micro‐ CT was used to visualize and quantify the degree of deformation and fluid distribution corresponding with each stress condition and injection cycle. Micro‐ CT images were segmented using a gradient‐based method to identify fluids (e.g., oil and water), and solid phase redistribution throughout the different experimental stages. Changes in porosity, tortuosity, and specific surface area were quantified as a function of applied confining pressure. Results demonstrate varying degrees of sensitivity of these properties to confining pressure, which suggests that caution must be taken when considering scalability of these properties for practical modeling purposes. Changes in capillary number with confining pressure are attributed to the increase in pore velocity as a result of pore contraction. However, this increase in pore velocity was found to have a marginal impact on average phase trapping at different confining pressures.},
doi = {10.1111/gfl.12143},
journal = {Geofluids},
number = 1,
volume = 16,
place = {United States},
year = {Mon May 25 00:00:00 EDT 2015},
month = {Mon May 25 00:00:00 EDT 2015}
}
Web of Science
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